This shirt is 100% polyester, although the ink says it works best with natural fibers.

As you can see, I placed cardboard in the shirt and sleeves to separate the layers. This is an important step! If you don't do it, you'll be stamping through both sides.

I flew by the seat of my pants on this (and always, I'm wayward) and just started on the sleeve. If I were to do it again, I'd start on the back side. It went quickly and I was quite excited with the results.

I let the shirt dry overnight and then used a hot, dry iron to "set" the stamping, as recommended on the back of the stamp pad. Then I flipped the shirt over and completed the same thing on the back side.